二甲醚燃烧机理简化的化学反应动力学研究

Study on the combustion mechanism simplification of dimethyl ether based on the chemical reaction kinetics

采用化学反应动力学软件CHEMKIN对二甲醚的燃烧机理进行研究,根据敏感性分析结果和生成率分析法,对二甲醚燃烧化学动力学详细机理进行了简化,并将简化机理与详细反应机理进行对比。结果表明,温度敏感性最高的部分反应分别为288号反应、261号反应、246号反应、103号反应以及14号反应等34个基元反应,机理简化对绝热燃烧温度和层流火焰速度均有不同程度的影响,简化前后误差分别为17%和24%。

The combustion mechanism of dimethyl ether was studied by using chemical reaction kinetics software CHEMKIN.According to the sensitivity analysis results and the formation rate analysis,the detailed mechanism of the combustion chemical kinetics of dimethyl ether was simplified,and the simplified mechanism was compared with the detailed reaction mechanism.The results showed that the most sensitive reactions are the 34 reaction elements of reaction 288^(#),261^(#),246^(#),103^(#)and 14^(#),respectively.The simplified mechanism has different effects on the adiabatic combustion temperature and laminar flame velocity,and the errors are 17%and 24%,respectively.